Results 1 - 10 of 131

Message Fragmentation for Disrupted Links

by Philip Ginzboorg, Valtteri Niemi, Jörg Ott
"... Abstract—In networks with unstable links the connection between the sender and the receiver may be cut before the entire message has been transmitted. Quantization of the message into blocks before its transmission, enables message fragments consisting of one or more such blocks to be transmitted su ..."
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messages in disrupted networks; and (2) develop methods to analytically estimate the mean transmission time of fragmented message within a basic system model for the case of transmission over a single disrupted link. I.

Message Fragmentation for a Chain of Disrupted Links

by Philip Ginzboorg, Valtteri Niemi, Jörg Ott
"... Abstract—We investigate the problem of estimating the transmission time of fragmented messages over multiple disrupted links. We build a system model for the case where a single message is sent over a chain of links and the disruptions in these links are identically and independently distributed. Fo ..."
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Abstract—We investigate the problem of estimating the transmission time of fragmented messages over multiple disrupted links. We build a system model for the case where a single message is sent over a chain of links and the disruptions in these links are identically and independently distributed

On the Adaptation of Broadcast Transactions in Token-Passing Fieldbus Networks with Heterogeneous Transmission Media

by Mário Alves , Eduardo Tovar , Francisco Vasques - in Proc. of FET'2001 , 2001
"... Abstract Broadcast networks that are characterised by having different physical layers (PhL) demand some kind of traffic adaptation between segments, in order to avoid traffic congestion in linking devices. In many LANs, this problem is solved by the actual linking devices, which use some kind of f ..."
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of flow control mechanism that either tell transmitting stations to pause (the transmission) or just discard frames. In this paper, we address the case of token-passing fieldbus networks operating in a broadcast fashion and involving message transactions over heterogeneous (wired or wireless) physical

Service Disciplines Performance for GPRS with Link Adaptation and Heterogeneous Traffic

by Josep Bada, Fernando Casadevall - in Proceedings of the IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications
"... The General Packet Radio Service (GPRS) system provides packet switched data service with quality of service (QoS) over a GSM infrastructure. In order to cope with the QoS requirements, packet scheduling strategies are used. On the other hand, GPRS introduces four coding schemes with different degre ..."
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Earliest Deadline) and MLT (Minimum Laxity Threshold) are evaluated assuming both link adaptation (LA) strategy, based on BLER estimation, and heterogeneous traffic. Web browsing, fleet management, SMS (Short Message Service) and e-mail services are assumed. The performance of the proposed scheduling

Within-host population dynamics and the evolution of microparasites in a heterogeneous host population,

by Vitaly V Ganusov , Carl T Bergstrom , Rustom Antia - Evolution , 2002
"... Abstract. Why do parasites harm their hosts? The general understanding is that if the transmission rate and virulence of a parasite are linked, then the parasite must harm its host to maximize its transmission. The exact nature of such trade-offs remains largely unclear, but for vertebrate hosts it ..."
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. As in the simple model, we assume that different parasite strains differ only in their growth rate, r, and that r evolves so as to maximize the total transmission over the course of an infection. The average (expected) total transmission of a parasite with growth rate r in this heterogeneous host population

RESOURCE-AWARE ROUTING IN DELAY- AND DISRUPTION-TOLERANT NETWORKS

by Docteur De, L’université Du Luxembourg, Gabriel Sandulescu, Dissertation Defense Committee, Dr. Simin Nadjm-tehrani Supervisor, Dr. Steffen Rothkugel Chairman , 1968
"... Over recent years, the popularity of mobile networks has grown as a consequence of the ubiquity of communication devices. In many mobile networks, nodes can move freely and connect to their neighbours as they move into each other’s radio range. However, due to high node mobility, limited bandwidth o ..."
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in DTNs along four lines. First, the thesis presents the design and comparative evaluation of a delaytolerant routing protocol (ORWAR) which optimises message transmission and bandwidth usage during opportunistic encounters. This is done through the estimation

Model-based Loss Inference by TCP over Heterogeneous Networks. WiOpt 2004

by Dhiman Barman, Ibrahim Matta , 2004
"... Abstract. The Transmission Control Protocol (TCP) has been the protocol of choice for many Internet applications requiring reliable connections. The design of TCP has been challenged by the extension of connections over wireless links. In this paper, we investigate a Bayesian approach to infer at th ..."
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Abstract. The Transmission Control Protocol (TCP) has been the protocol of choice for many Internet applications requiring reliable connections. The design of TCP has been challenged by the extension of connections over wireless links. In this paper, we investigate a Bayesian approach to infer

1Link Estimation and Routing in Sensor Network Backbones: Beacon-based or Data-driven?

by Hongwei Zhang, Anish Arora, Senior Member, Prasun Sinha
"... Abstract — In the context of IEEE 802.11b network testbeds, we examine the differences between unicast and broadcast link properties, and we show the inherent difficulties in precisely estimating unicast link properties via those of broadcast beacons even if we make the length and transmission rate ..."
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Abstract — In the context of IEEE 802.11b network testbeds, we examine the differences between unicast and broadcast link properties, and we show the inherent difficulties in precisely estimating unicast link properties via those of broadcast beacons even if we make the length and transmission rate

doi:10.1155/2012/826702 Research Article Exploiting the Burstiness of Intermediate-Quality Wireless Links

by Muhammad Hamad Alizai, Olaf L, Klaus Wehrle
"... Copyright © 2012 Muhammad Hamad Alizai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. We address the challenge of link estima ..."
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estimation and routing over highly dynamic links, thats is, bursty links that rapidly shift between reliable and unreliable periods of transmissions. Based on significant empirical evidence of over 100,000 transmissions over each link in 802.15.4 and 802.11 testbeds, we propose two metrics, expected future

On Modeling Low-Power Wireless Protocols Based on Synchronous Packet Transmissions

by unknown authors
"... Abstract—Mathematical models play a pivotal role in understanding and designing advanced low-power wireless systems. However, the distributed and uncoordinated operation of traditional multi-hop low-power wireless protocols greatly complicates their accurate modeling. This is mainly because these pr ..."
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these protocols build and maintain substantial network state to cope with the dynamics of low-power wireless links. Recent protocols depart from this design by leveraging synchronous transmissions (ST), whereby multiple nodes simultaneously transmit towards the same receiver, as opposed to pairwise link
Results 1 - 10 of 131